I just got my hands on a 1986 camaro that has been transformed into a TPI 5.7L with alot of aftermarket parts. It has a hypertech sticker under the hood, and so far, I have been able to identify at least one part for every sticker.

so, I call the hypertech people, give them the four letter code from the ecm housing, and they tell me I have a chevy baretta computer. WTF?

Whatever info you guys need, let me know. I dont know what you will need, so...

 

the speed-density 90-92 ECM as used in the F-body is the same as the ones used in a lot of the 87-up speed-density 60V6 cars, berettas included.

what you need to check is what the PROM inside of the ECM is meant for.

 

I had that out and checked, according to research on this site, it is an L98 TPI PROM.

So, if I understand this, the ECM from a beretta will work, as long as the PROM is from the right engine?

What are the advantages?

*EDIT I think I understand. it is so that it measures engine speed and load, versus air flow. Right?

Next question, the engine is modified, so would I not have to remap the fuel and timing for the setup?

Someone has played with the chip. there is black tape over the IC with the sightglass, that tells me its been taken apart. IDK why, or what was done. Is there any way to read it?

 

you can swap the ECMs between say a 2.8 beretta and a 5.7 90-92 camaro and you would never know the difference. as long as the correct PROM is there, it's not an issue.

a modified engine can certainly benefit from a custom tune, even stock engines benefit.

sounds like someone erased the UV PROM in the MEMCAL and wrote their own tune to it. if you have a PROM burner, you could hook a header up to the bottom of the MEMCAL to the correct pins on the burner and read it that way easily, otherwise you would need to use mode 2/3 ALDL commands(i can never remember which) and you'll be able to dump the entire tune out through the ALDL port and inspect it that way.

 

gotcha.

So, I need to hunt for a reader/burner.

Once I get said device, Can I safely assume that i can ask my million questions here, so that i dont burn it up, or worse?

I'm new to electronic management, so bear with me as I hit the learning curve, lol.


I found this:

http://www.lt1swap.com/ecmtuning.htm

Found this too:
https://www.thirdgen.org/promintro

 

the moates BURN2 + HDR1 will make very simple and easy work of pulling the tune. however, the BURN2 can't program the old UV erased PROMs, so you would either need to solder in a FLASH replacement (27SF512 work great, moates sells them for $5 each) or use an adapter like the moates G1/G3 to bypass the PROM in the MEMCAL. you would still need a flash chip(27SF512 for a G1, 29F040B for a G3), but you wouldn't need to tear anything apart or have the soldering skills necessary to mount the flash PROM in place of the UV erased PROM.

both methods have their benefits, or you would even go so far as to play with emulation via an ostrich/autoprom.

it all really depends on how much money you're willing to sink into it.